Revert of Force full GCwhenever CollectAllGarbage is meant to trigger a full GC.

Revert of Force full GCwhenever CollectAllGarbage is meant to trigger a full GC. (patchset #4 id:60001 of https://codereview.chromium.org/1082973003/)

Reason for revert:
[Sheriff] Breaks http://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/3348 and maybe leads to timeouts/crashes on layout test bots:
http://build.chromium.org/p/client.v8/builders/V8-Blink%20Linux%2064/builds/3002

Original issue's description:
> Force full GC whenever CollectAllGarbage is meant to trigger a full GC.
>
> Add a finalize incremental marking mode for CollectAllGarbage to finalize incremental marking when incremental marking is in progress, but we want a full gc at a given CollectAllGarbage call site.
>
> Default mode for CollectAllGarbage is finalize incremental marking and perform a full GC.
>
> BUG=
>
> Committed: https://crrev.com/9c105f0940ba757364ac18fcdf649815ec5ab2d1
> Cr-Commit-Position: refs/heads/master@{#27831}

TBR=ulan@chromium.org,hpayer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Committed: https://crrev.com/301151545e2c16fd936216afc73007a880516fb3
Cr-Commit-Position: refs/heads/master@{#27834}

[Michael Achenbach, 2015-04-15 09:06:57]

Created Revert of Force full GCwhenever CollectAllGarbage is meant to trigger a
full GC.

[commit-bot: I haz the power, 2015-04-15 09:07:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1088083002/1

[commit-bot: I haz the power, 2015-04-15 09:07:33]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-15 09:07:45]

Patchset 1 (id:??) landed as
https://crrev.com/301151545e2c16fd936216afc73007a880516fb3
Cr-Commit-Position: refs/heads/master@{#27834}